package com.diana.common;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;

import com.alibaba.fastjson.JSON;
import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.CellType;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.ss.usermodel.Workbook;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.alibaba.fastjson.JSONObject;

public class ExcelUtils {
	private static final Logger LOG = LoggerFactory.getLogger(ExcelUtils.class);

	/**
	 * 读入excel文件，解析后返回
	 * 
	 * @param file
	 * @throws IOException
	 */
	public static List<String[]> readExcel(File file) throws IOException {
		// 检查文件
		checkFile(file);
		// 获得Workbook工作薄对象
		Workbook workbook = getWorkBook(file);
		// 创建返回对象，把每行中的值作为一个数组，所有行作为一个集合返回
		List<String[]> list = new ArrayList<String[]>();
		if (workbook != null) {
			for (int sheetNum = 0; sheetNum < workbook.getNumberOfSheets(); sheetNum++) {
				// 获得当前sheet工作表
				Sheet sheet = workbook.getSheetAt(sheetNum);
				if (sheet == null) {
					continue;
				}
				// 获得当前sheet的开始行
				int firstRowNum = sheet.getFirstRowNum();
				// 获得当前sheet的结束行
				int lastRowNum = sheet.getLastRowNum();
				// 循环除了第一行的所有行
				for (int rowNum = firstRowNum + 1; rowNum <= lastRowNum; rowNum++) {
					// 获得当前行
					Row row = sheet.getRow(rowNum);
					if (row == null) {
						continue;
					}
					// 获得当前行的开始列
					int firstCellNum = row.getFirstCellNum();
					// 获得当前行的列数
					int lastCellNum = row.getPhysicalNumberOfCells();
					String[] cells = new String[row.getPhysicalNumberOfCells()];
					if (Utils.isNullOrEmpty(getCellValue(row.getCell(0))))
						break;
					// 循环当前行
					for (int cellNum = firstCellNum; cellNum < lastCellNum; cellNum++) {
						Cell cell = row.getCell(cellNum);
						cells[cellNum] = getCellValue(cell);
					}
					list.add(cells);
				}
			}
			workbook.close();
		}
		return list;
	}

	public static void checkFile(File file) throws IOException {
		// 判断文件是否存在
		if (null == file) {
			LOG.error("文件不存在！");
			throw new FileNotFoundException("文件不存在！");
		}
		// 获得文件名
		String fileName = file.getName();
		// 判断文件是否是excel文件
		if (!fileName.endsWith("xls") && !fileName.endsWith("xlsx")) {
			LOG.error(fileName + "不是excel文件");
			throw new IOException(fileName + "不是excel文件");
		}
	}

	public static Workbook getWorkBook(File file) {
		// 获得文件名
		String fileName = file.getName();
		// 创建Workbook工作薄对象，表示整个excel
		Workbook workbook = null;
		try {
			// 获取excel文件的io流
			InputStream is = new FileInputStream(file);
			// 根据文件后缀名不同(xls和xlsx)获得不同的Workbook实现类对象
			if (fileName.endsWith("xls")) {
				// 2003
				workbook = new HSSFWorkbook(is);
			} else if (fileName.endsWith("xlsx")) {
				// 2007
				workbook = new XSSFWorkbook(is);
			}
		} catch (IOException e) {
			LOG.info(e.getMessage());
		}
		return workbook;
	}

	@SuppressWarnings("deprecation")
	public static String getCellValue(Cell cell) {
		String cellValue = "";
		if (cell == null) {
			return cellValue;
		}
		// 把数字当成String来读，避免出现1读成1.0的情况
		if (cell.getCellType() == Cell.CELL_TYPE_NUMERIC) {
			cell.setCellType(Cell.CELL_TYPE_STRING);
		}
		// 判断数据的类型
		switch (cell.getCellType()) {
		case Cell.CELL_TYPE_NUMERIC: // 数字
			cellValue = String.valueOf(cell.getNumericCellValue());
			break;
		case Cell.CELL_TYPE_STRING: // 字符串
			cellValue = String.valueOf(cell.getStringCellValue());
			break;
		case Cell.CELL_TYPE_BOOLEAN: // Boolean
			cellValue = String.valueOf(cell.getBooleanCellValue());
			break;
		case Cell.CELL_TYPE_FORMULA: // 公式
			cellValue = String.valueOf(cell.getCellFormula());
			break;
		case Cell.CELL_TYPE_BLANK: // 空值
			cellValue = "";
			break;
		case Cell.CELL_TYPE_ERROR: // 故障
			cellValue = "非法字符";
			break;
		default:
			cellValue = "未知类型";
			break;
		}
		return cellValue;
	}


	public void writeExcel03() throws IOException {
		// 创建工作簿
		HSSFWorkbook workBook = new HSSFWorkbook();
		// 创建工作表 工作表的名字叫helloWorld
		HSSFSheet sheet = workBook.createSheet("helloWorld");
		// 创建行,第3行
		HSSFRow row = sheet.createRow(2);
		// 创建单元格，操作第三行第三列
		HSSFCell cell = row.createCell(2, CellType.STRING);
		cell.setCellValue("helloWorld");
		File file = new File("d:\\测试.xls");
		if (!file.exists())
			file.createNewFile();
		workBook.write(file);
		workBook.close();// 最后记得关闭工作簿
	}

	public static void main(String[] args) throws Exception {

	}

	public static File exportTest(String path,List<Map<String, Object>> list) throws IOException {
		String [] head = {"管理员Id","角色Id","登录名","昵称","手机","邮箱","状态","创建时间"};
		HSSFWorkbook workbook = new HSSFWorkbook();
		HSSFSheet sheet = workbook.createSheet("用户信息");
		HSSFRow row0 = sheet.createRow(0);
		for(int i=0;i<head.length;i++) {
			HSSFCell cell = row0.createCell(i, CellType.STRING);
			cell.setCellValue(head[i]);
		}
		int index = 1;
		for (Map<String, Object> map : list) {
			JSONObject jo = (JSONObject) JSON.toJSON(map);
			HSSFRow row = sheet.createRow(index++);
			HSSFCell cell0 = row.createCell(0, CellType.STRING);
			cell0.setCellValue(jo.getString("managerId"));
			HSSFCell cell1 = row.createCell(1, CellType.STRING);
			cell1.setCellValue(jo.getString("roleId"));
			HSSFCell cell2 = row.createCell(2, CellType.STRING);
			cell2.setCellValue(jo.getString("loginName"));
			HSSFCell cell3 = row.createCell(3, CellType.STRING);
			cell3.setCellValue(jo.getString("nikeName"));
			HSSFCell cell4 = row.createCell(4, CellType.STRING);
			cell4.setCellValue(jo.getString("phone"));
			HSSFCell cell5 = row.createCell(5, CellType.STRING);
			cell5.setCellValue(jo.getString("email"));
			HSSFCell cell6 = row.createCell(6, CellType.STRING);
			cell6.setCellValue(jo.getString("status"));
			HSSFCell cell7 = row.createCell(7, CellType.STRING);
			cell7.setCellValue(jo.getString("createTime"));
		}
		File file = new File(path+System.currentTimeMillis()+".xls");
		file.createNewFile();
		workbook.write(file);
		workbook.close();
		return file;
	}

}
